Scientists and health experts at the World Health Organization and Centers for Disease Control are constantly on guard against diseases that could sweep through the human population. Which pandemics are they most worried about, heading into 2014? »12/24/13 3:30pm 12/24/13 3:30pm

Since it was first discovered in late March of this year, the H7N9 virus has infected 60 people, killing 13. It’s not clear whether the virus can spread from person to person. But as the first round of tests on the virus has shown, it has some troublesome characteristics. »4/16/13 3:20pm 4/16/13 3:20pm

A total of eight people have now died following exposure to H7N9, a lethal new strain of bird flu that by last count had infected at least 24 people. Concern, expressed by epidemiologists and felt by people around the world, is prudent and warranted. Panic, and the rhetoric that comes with it, is not. »4/09/13 12:41pm 4/09/13 12:41pm